arm64: lx2160a: dts: Fix UART node status

LX2160A PL011 UART driver fetch IP block values using
platform data from board file instead of device tree.

Modified UART nodes in device tree to disable state.
Signed-off-by: NVabhav Sharma <vabhav.sharma@nxp.com>
Reviewed-by: NPriyanka Jain <priyanka.jain@nxp.com>

arch/arm/dts/fsl-lx2160a.dtsi

@@ -127,12 +127,14 @@
 		compatible = "arm,pl011";
 		reg = <0x0 0x21c0000 0x0 0x1000>;
 		clocks = <&clockgen 4 0>;
+		status = "disabled";
 	};
 
 	uart1: serial@21d0000 {
 		compatible = "arm,pl011";
 		reg = <0x0 0x21d0000 0x0 0x1000>;
 		clocks = <&clockgen 4 0>;
+		status = "disabled";
 	};
 
 	uart2: serial@21e0000 {